![]() ![]() ![]() ![]() ![]() ![]() |
The following section provides an example of how to convert a WLEC application to use WebLogic Tuxedo Connector. This example provides information on the steps required to convert the WebLogic Server 6.1 examples\wlec\ejb\simpapp
example to work using the WebLogic Tuxedo Connector. A complete migrated FactoryFinder example is available from the
BEA dev2dev code library. Review the Prerequisites before proceeding.
This section provides information on how to modify the Tuxedo configuration files to use with WebLogic Tuxedo Connector.
You should run the Tuxedo CORBA simpapp
example to verify your Tuxedo environment and prepare to run the WLEC simpapp application.
Use the following steps to run the Tuxedo example located at $TUXDIR/samples/corba/simpapp
:
simpapp
example. Copy the Tuxedo CORBA simpapp
example from your Tuxedo installation and place it in your working simpapp
directory. simpapp
directory.set
%TUXDIR%
in your shell environment. Unix users need to set the Tuxedo environment by running $TUXDIR/tux.env
. PATH
.runme
script. This will create the client stubbs that provide the programming interface for CORBA object operations. A results
directory is created in your working directory that contains the files used to configure the Tuxedo environment.
java -DTOBJADDR=%TOBJADDR% -classpath %CLASSPATH% SimpleClient |
tmshutdown -y |
In your working Tuxedo simpapp
directory, use the following steps to modify your UBB
configuration:
results/ubb
file in your working directory as results/ubbdomain
.ubbdomain
file using a text editor, such as vi or WordPad.*SERVERS
section.Example: Add the following servers.
DMADM SRVGRP=SYS_GRP SRVID=7
GWADM SRVGRP=SYS_GRP SRVID=8
GWTDOMAIN SRVGRP=SYS_GRP SRVID=9
ubbdomain
file.
The following code is an example of a modified ubbdomain
file. Changed sections are marked in bold.
*RESOURCES
IPCKEY 55432
DOMAINID simpapp
MASTER SITE1
MODEL SHM
LDBAL N
*MACHINES
"balto"
LMID = SITE1
APPDIR = "/tux_apps/corba/simpapp"
TUXCONFIG = "/tux_apps/corba/simpapp/results/tuxconfig"
TUXDIR = "/my_machine/tux/tuxedo8.1"
MAXWSCLIENTS = 10
*GROUPS
SYS_GRP
LMID = SITE1
GRPNO = 1
APP_GRP
LMID = SITE1
GRPNO = 2
*SERVERS
DEFAULT:
RESTART = Y
MAXGEN = 5
TMSYSEVT
SRVGRP = SYS_GRP
SRVID = 1
TMFFNAME
SRVGRP = SYS_GRP
SRVID = 2
CLOPT = "-A -- -N -M"
TMFFNAME
SRVGRP = SYS_GRP
SRVID = 3
CLOPT = "-A -- -N"
TMFFNAME
SRVGRP = SYS_GRP
SRVID = 4
CLOPT = "-A -- -F"
simple_server
SRVGRP = APP_GRP
SRVID = 1
RESTART = N
# The ISL handler is not needed for WTC.
# If you do not need it for other WLEC applications,
# it can be removed.
ISL
SRVGRP = SYS_GRP
SRVID = 5
CLOPT = "-A -- -n //mymachine:2468 -d /dev/tcp"
DMADM
SRVGRP = SYS_GRP
SRVID = 7
GWADM
SRVGRP = SYS_GRP
SRVID = 8
GWTDOMAIN
SRVGRP = SYS_GRP
SRVID = 9
*SERVICES
In your working Tuxedo simpapp
directory, use the following steps to create a domain configuration:
dmconfig
code example into your editor.*DM_RESOURCES
VERSION=U22
*DM_LOCAL_DOMAINS
TUXDOM GWGRP=SYS_GRP
TYPE=TDOMAIN
DOMAINID="TUXDOM"
BLOCKTIME=20
MAXDATALEN=56
MAXRDOM=89
DMTLOGDEV="<Path to domain TLOG device>"
DMTLOGNAME="DMTLOG_TUXDOM"
*DM_REMOTE_DOMAINS
examples TYPE=TDOMAIN DOMAINID="examples"
*DM_TDOMAIN
TUXDOM NWADDR="<network address of Tuxedo domain>"
examples NWADDR="<network address of WTC domain>"
*DM_REMOTE_SERVICES
dmconfig
in your working simpapp/results
directory.Use the following steps to validate your Tuxedo configuration:
simpapp/results
directory.setenv
script for your platform.ubbdomain
file:
|
dmconfig
file:
|
|
java -DTOBJADDR=%TOBJADDR% -classpath %CLASSPATH% SimpleClient |
|
Use a text editor such as Vi or Notepad to remove connection pool descriptors and update the trans-attribute. The following listing provides a code example on how to remove references to the IIOP connection pool descriptors in the WLEC simpapp
example ejb-jar.xml
.
env-entry
attribute.trans-attribute
in the container-transaction
to Supports
. As the example does not have a transaction, the container-transaction
can not be Required
..
.
.
<ejb-jar>
<enterprise-beans>
<session>
<ejb-name>ejb</ejb-name>
<home>examples.wlec.ejb.simpapp.ConverterHome</home>
<remote>examples.wlec.ejb.simpapp.Converter</remote>
<ejb-class>examples.wlec.ejb.simpapp.ConverterBean</ejb-class>
<session-type>Stateless</session-type>
<transaction-type>Container</transaction-type>
<!-- Remove or comment out the following statements
<env-entry>
<env-entry-name>IIOPPoolName</env-entry-name>
<env-entry-type>java.lang.String</env-entry-type>
<env-entry-value>simplepool</env-entry-value>
</env-entry>
-->
</session>
</enterprise-beans>
<assembly-descriptor>
<container-transaction>
<method>
<ejb-name>ejb</ejb-name>
<method-intf>Remote</method-intf>
<method-name>*</method-name>
</method>
<trans-attribute>Supports
</trans-attribute>
</container-transaction>
</assembly-descriptor>
</ejb-jar>
A build.xml
file is presented below to simplify compiling and deploying your migrated application in the Weblogic environment. Use the following example code to replace the contents of the build.xml
file.
<project name="wlec-ejb-simpapp" default="all" basedir=".">
<!-- set global properties for this build -->
<property environment="env"/>
<property file="../../../../examples.properties"/>
<property name="build.compiler" value="${compiler}"/>
<property name="source" value="."/>
<property name="build" value="${source}/build"/>
<property name="dist" value="${source}/dist"/>
<property name="ejb_classes" value="Converter.java, ConverterHome.java, ConverterResult.java,
ProcessingErrorException.java, ConverterBean.java"/>
<property name="ejb_jar" value="wlec_simpapp_corba.jar"/>
<property name="client_classes" value="Converter.java, ConverterHome.java, ConverterResult.java,
ProcessingErrorException.java, Client.java"/>
<target name="all" depends="clean, init, compile_idl, compile_ejb, jar_ejb, appc, compile_client"/>
<target name="init">
<!-- Create the time stamp -->
<tstamp/>
<!-- Create the build directory structure used by compile
and copy the deployment descriptors into it-->
<mkdir dir="${build}"/>
<mkdir dir="${build}/META-INF"/>
<mkdir dir="${dist}"/>
<copy todir="${build}/META-INF">
<fileset dir="${source}">
<include name="*.xml"/>
<exclude name="build.xml"/>
</fileset>
</copy>
</target>
<!-- Compile IDL stub classes into the build directory (jar preparation) -->
<target name="compile_idl">
<exec executable="idlj" dir=".">
<arg line="-td build -pkgPrefix Simple simple -pkgPrefix SimpleFactory simple simple.idl" />
</exec>
<javac srcdir="${build}" destdir="${build}"
classpath="${CLASSPATH};${build}"/>
<delete>
<fileset dir="${build}">
<include name="*.java"/>
</fileset>
</delete>
</target>
<!-- Compile ejb classes into the build directory (jar preparation) -->
<target name="compile_ejb">
<javac srcdir="${source}" destdir="${build}"
includes="${ejb_classes}"
classpath="${CLASSPATH};${build}"/>
</target>
<!-- Make a standard ejb jar file, including XML deployment descriptors -->
<target name="jar_ejb" depends="compile_ejb">
<jar jarfile="${dist}/std_${ejb_jar}"
basedir="${build}">
</jar>
</target>
<!-- Run appc to create the deployable jar file -->
<target name="appc" depends="jar_ejb">
<echo message="Generating container classes in ${apps.dir}/${ejb_jar}"/>
<wlappc debug="${debug}"
iiop="true"
source="${dist}/std_${ejb_jar}"
output="${apps.dir}/${ejb_jar}"
/>
</target>
<!-- Compile EJB interfaces & client app into the clientclasses directory
-->
<target name="compile_client">
<javac srcdir="${source}"
destdir="${client.classes.dir}"
includes="${client_classes}"
/>
</target><target name="run">
<java classname="examples.wlec.ejb.simpapp.Client">
</java>
</target>
<target name="clean">
<delete dir="${build}"/>
<delete dir="${dist}"/>
</target>
</project>
The following listing provides a code example on how to modify the wlec/ejb/simpapp
example ConverterBean.java
file to interoperate with Tuxedo using WebLogic Tuxedo Connector.
new code
//
and look like this: // old code
package examples.wlec.ejb.simpapp;
import javax.ejb.*;
import java.io.Serializable;
import java.util.*;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import org.omg.CORBA.*;
import com.beasys.Tobj.*;
import com.beasys.*;
/*These come from WebLogic Enterprise Simpapp sample *///import SimpleFactory;
//import SimpleFactoryHelper;
//import Simple;
import simple.SimpleFactory;
import simple.SimpleFactoryHelper;
import simple.Simple;
/**
* <font face="Courier New" size=-1>ConverterBean</font> is a stateless
* SessionBean.
* This bean illustrates:
* <ul>
* <li> Accessing ISL/ISH process and then a WebLogic Enterprise server
* <li> No persistence of state between calls to the SessionBean
* <li> Application-defined exceptions
* </ul>
*
* @author Copyright (c) 1999-2001 by BEA Systems, Inc. All Rights Reserved.
*/
public class ConverterBean implements SessionBean {
static SimpleFactory simple_factory_ref;
// -----------------------------------------------------------------
// private variables
private SessionContext ctx;
private Context rootCtx;private ORB orb;
// -----------------------------------------------------------------
// SessionBean implementation
/**
* This method is required by the EJB Specification,
* but is not used by this example.
*
*/
public void ejbActivate() {}
/**
* This method is required by the EJB Specification,
* but is not used by this example.
*
*/
public void ejbRemove() {}
/**
* This method is required by the EJB Specification,
* but is not used by this example.
*
*/
public void ejbPassivate() {}
/**
* Sets the session context.
*
* @param ctx SessionContext context for session
*/
public void setSessionContext(SessionContext ctx) {
this.ctx = ctx;
}
// Interface exposed to EJBObject
/**
* This method corresponds to the <font face="Courier New" size=-1>create</font>
* method in the home interface <font
*face="CourierNew"size=-1>ConverterHome.java</font>.
* The parameter sets of these two methods are identical. When the client calls the
* <font face="Courier New" size=-1>ConverterHome.create</font> method, the
* container allocates an instance of the EJBean and calls the
* <font face="Courier New" size=-1>ejbCreate</font> method.
*
* @exception CreateException
* if there is an error while initializing the IIOP pool
* @see examples.wlec.ejb.simpapp.Converter
*/
public void ejbCreate () throws CreateException {
try {// try {
// Properties p = new Properties();
// p.put(Context.INITIAL_CONTEXT_FACTORY,
// "weblogic.jndi.WLInitialContextFactory");
// InitialContext ic = new InitialContext(p);
// rootCtx = (Context)ic.lookup("java:comp/env");
// }
//catch (NamingException ne) {
// throw new CreateException("Could not lookup context");
// }// Initialize the ORB.
String args[] = null;
Properties Prop;
Prop = new Properties();
Prop.put("org.omg.CORBA.ORBClass",
"weblogic.wtc.corba.ORB");
orb = (ORB)new InitialContext().lookup("java:comp/ORB");
initIIOPpool();
}
catch (Exception e) {
throw new CreateException("ejbCreate called: " + e);
}
}
/**
* Converts the string to uppercase.
*
* @param mixed string input data
* @return ConverterResult conversion result
* @exception examples.wlec.ejb.simpapp.ProcessingErrorException
* if there is an error while converting the string
*/
public ConverterResult toUpper(String mixed)
throws ProcessingErrorException
{
return convert("UPPER", mixed);
}
/**
* Converts the string to lowercase.
*
* @param mixed string input data
* @return ConverterResult conversion result
* @exception examples.wlec.ejb.simpapp.ProcessingErrorException
* if there is an error while converting the string
*/
public ConverterResult toLower(String mixed)
throws ProcessingErrorException
{
return convert("LOWER", mixed);
}
protected ConverterResult convert (String changeCase, String mixed)
throws ProcessingErrorException
{
String result;
try {
// Find the simple object.
Simple simple = simple_factory_ref.find_simple();
if (changeCase.equals("UPPER")) {
// Invoke the to_upper opeation on M3 Simple object
org.omg.CORBA.StringHolder buf = new org.omg.CORBA.StringHolder(mixed);
simple.to_upper(buf);
result = buf.value;
}
else
{
result = simple.to_lower(mixed);
}
}
catch (org.omg.CORBA.SystemException e) {
throw new ProcessingErrorException("Converter error: Corba system exception: " + e);
}
catch (Exception e) {
throw new ProcessingErrorException("Converter error: " + e);
}
return new ConverterResult(result);
}// Private methods
/**
* Returns the WebLogic Enterprise Connectivity pool name.
*
* @return String IIOP pool name
*/
// private String getIIOPPoolName() throws ProcessingErrorException {
// try {
// return (String) rootCtx.lookup("IIOPPoolName");
//}
// catch (NamingException ne) {
// throw new ProcessingErrorException ("IIOPPoolName not found in context");
//}
//}
/**
* Initializes an IIOP connection pool.
*/
private void initIIOPpool() throws Exception {
try {
// Create the bootstrap object,// Tobj_Bootstrap bootstrap = // BootstrapFactory.getClientContext(getIIOPPoolName());
// Use the bootstrap object to find the factory finder.// org.omg.CORBA.Object fact_finder_oref =
org.omg.CORBA.Object fact_finder_oref =
// bootstrap.resolve_initial_references("FactoryFinder") ;
orb.string_to_object("corbaloc:tgiop:simpapp/FactoryFinder");
// Narrow the factory finder.
FactoryFinder fact_finder_ref =
FactoryFinderHelper.narrow(fact_finder_oref);
// Use the factory finder to find the simple factory.
org.omg.CORBA.Object simple_fact_oref =
fact_finder_ref.find_one_factory_by_id(SimpleFactoryHelper.id());
// Narrow the simple factory.
simple_factory_ref =
SimpleFactoryHelper.narrow(simple_fact_oref);
}
catch (org.omg.CosLifeCycle.NoFactory e) {
throw new Exception("Can't find the simple factory: " +e);
}
catch (CannotProceed e) {
throw new Exception("FactoryFinder internal error: " +e);
}
catch (RegistrarNotAvailable e) {
throw new Exception("FactoryFinder Registrar not available: " +e);
}//catch (InvalidName e) {
catch (org.omg.CORBA.UserException e) {
// throw new Exception("Invalid name from resolve_initial_reference(): " +e);
//}
// catch (org.omg.CORBA.BAD_PARAM e) {
// throw new Exception("Invalid TOBJADDR=//host:port property specified: " +e);
// }
throw new Exception("Unexpected CORBA user exception: " +e);
}
catch (org.omg.CORBA.SystemException e) {
throw new Exception("CORBA system exception: " +e);
}
}
}
Use the following steps to configure WebLogic Tuxedo Connector to connect WebLogic Server and the modified WLEC application:
Use the following steps to create and configure a WTC service using the WebLogic Server Administration Console:
Note: | When configuring the Network Address for a local access point, the port number used should be different from any port numbers assigned to other processes. Example: Setting the Network Address to //mymachine:7001 is not valid if the WebLogic Server listening port is assigned to //mymachine:7001 . |
Use the following steps to configure a local Tuxedo access point:
In Access Point, enter My_Local_WLS_Dom.
In Access Point Id, enter examples
.
Example: //
my_WLS_machine:5678
Use the following steps to configure a remote Tuxedo access point:
In Access Point, enter My_WLEC_Dom.
In Access Point Id, enter TUXDOM.
In Local Access Point, enter My_Local_WLS_Dom.
Example: //
my_TUX_machine
:5678
Use the following steps to configure an imported service:
In Resource Name, enter //simpapp.
In Local Access Point, enter My_Local_WLS_Dom.
In Remote Access Point List, enter My_WLEC_Dom.
In Remote Name, enter "//domain_id" where domain_id is DOMAINID
specified in the Tuxedo UBBCONFIG
file. The maximum length of this unique identifier for CORBA domains is 15 characters and includes the //.
simpapp
example.
NT\2000 users run the following command: results\setenv.cmd
Unix users run the following command: results\setenv.sh
|
simpapp
example.Note: | NT/2000 users modify and run the setExamplesEnv.cmd. Unix users copy ./config/examples/setExamplesEnv.sh script to your WLEC simpapp directory, then modify and run the setExamplesEnv.sh script. |
The Java application generates the following output:
|
If you have a problem running the example, use the WTC tracing feature. See Monitoring the WebLogic Tuxedo Connector.
![]() ![]() ![]() |